Finding the Fourth Proportional to 396.62, 546.99 and 280.70
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Solution
The fourth proportional to 396.62, 546.99 and 280.70 is: 387.12
Step by Step Solution
- Step 1: Write the proportion equation
396.62 : 546.99 = 280.70 : x - Step 2: Convert to fraction form
396.62/546.99 = 280.70/x - Step 3: Cross multiply
396.62x = 546.99 × 280.70 - Step 4: Simplify right side
396.62x = 153,540.09 - Step 5: Solve for x
x = 153,540.09/396.62 - Step 6: Final answer
x = 387.12
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.